MTMI Mammography: Digital Mammography QC/Digital Mammography questions with correct answer, Exams of Nursing

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MTMI Mammography: Digital Mammography

QC/Digital Mammography questions with

correct answers

What control manual should FFDM machines used for QC? Answer✓✓ manual from the manufacturer Which are the QC unique test to DM? 6 Answer✓✓ Monitor Cleaning Flatfield/Detector calibration Artifact Evaluation CNR- Contrast to Noise Ration SNR -Signal to Noise Ration MTF Modulation Transfer Function What is purpose of Monitor cleaning and frequency? Answer✓✓ ensures good image review conditions by keeping the monitor screens free of dust, finger prints and marks that may osbcure clinical information Daily What equipment is used for monitor cleaning? Answer✓✓ used only material specific to FFDM QC manual such dry, soft cloth or cleaning tissue (cloth may be slighly dumped ) What is the purpose of Detector Calibration and frequency? Answer✓✓ Corrects non-uniformities (intensities) brings sensitivity of pixels back zero

Weekly What equipment is used for detector calibration TEST? Answer✓✓ acrylic block What is the pupose of ARTIFACT EVALUATION TEST and frequency? Answer✓✓ looks for any trouble spots. ptential artifacts Weekly What are the potential artifacts when doing artifact eval test? 3 Answer✓✓ Dead piexels Banding Ghosting The acrylic block or PIMMA phantom are the test tools for? Answer✓✓ Detector calibration Artifact Evaluation What is the purpose of Phantom Imaging TEST and frequency? Answer✓✓ assess quality and consistency of image weekly What is the purpose of SNR- Signal to Noise Ration and frequency? Answer✓✓ measure how much true signal reflecting from actual anatomy from versus how much noise a particular image has

What is the purpose of Modulation Transfer Function (MTF) and frequency? Answer✓✓ describes the resolution of the final digital image (how well the final image replication of the actual image is) Higher the MTF the better____ Answer✓✓ the resolution What is the purpose of Monitor Calibration QC and frequency? Answer✓✓ ensure display monitors are operating to design standards SMPTE or AAPM Task Group pattern are used for? Answer✓✓ Monitor Calibration QC SMPTE Answer✓✓ SMPTE AAPM Task Group 18 Answer✓✓ AAPM Task Group 18 What is SMPTE used for or what it does? Answer✓✓ either sent to laser printer or monitor to do QC on monitor itself What influential clinical study helped drive the demand for digital units being sold and it's result showed DM was better for finding breast cancer in pre menopausal women with dense breast? Answer✓✓ Digital Mammographic Imaging Trial AKA DMIST What is Image Aquisition? Answer✓✓ x-rays generated that pass through the breast and captured by the IR or Digital Detector

What converts the analog signals to digital information (1 and 0's)? Answer✓✓ Image dectector What are the 2 types of image capture? Answer✓✓ Indirect digital capture Direct digital capture Which digital capture involves a step light? Answer✓✓ indirect What measures the quantity of x-ray photons that pass through the breast and converts x-rays into electrical charge? Answer✓✓ Digital detector What are the 2 types of digital receptors? Answer✓✓ Indirect Direct What is the indirect digital receptor made of? Answer✓✓ Phosphor flat panel What is the direct digital receptor made of? Answer✓✓ Amorphous Selenium Flat panel What is the phosphor name of the indirect digital detector? Answer✓✓ Celsium Iodide Where is x-ray converted into light in indirect digital detector? Answer✓✓ Celcium Iodide (scintillator)

What does the DQE measures? Answer✓✓ the efficiency of the detector Mammography detectors are what # of bits? Answer✓✓ 14 bits Review Workstations are what # of bits? Answer✓✓ 10-12 bits What is the purpose of Digital Detectors? 2 Answer✓✓ To absorb x-ray energy Convert that energy to electrical charge What Bits Per Pixel control? Answer✓✓ Latitude What are the 2 properties of Digital Image? Answer✓✓ Pixel size Bits per pixel What is the largest pixel size used in mammo detectors? Answer✓✓ 100 micron What limits spatial resolution (image detail)? Answer✓✓ Pixel size Pixel Depth determines? Answer✓✓ contrast and latitude What dertemines spatial resolution (detail)? Answer✓✓ Pixel Size High efficiency is determined by? Answer✓✓ DQE (detector Quantum Efficiency)

What determines contrast and latitude? Answer✓✓ Pixel Depth